Zend Framework is an open-source framework for developing web applications and services using the PHP programming language. It provides a collection of reusable components and tools that help developers build robust and scalable applications efficiently. The framework follows the Model-View-Controller (MVC) design pattern, which separates the application logic from the user interface, making it easier to manage and maintain code. Initially released in 2006, Zend Framework has evolved over the years and is now part of the Laminas Project. This transition ensures ongoing support and development, allowing developers to leverage modern features and best practices in their web applications.